Thermal cut-out



Jan. 19, 1932.

,, J. M. FRIED THERMAL cur-our Filed Aug. 20, 1929 llllllllll Y which the fuse plug discl is in? in whic Patented Jam19,1932 -v 1,842,091

UNITE STATES. PAT-ENT- OFFICE aces 1:, ram. or vxcxsauae, inssrssmr manna cur-our Application guea Ann-t 20, was. sex-mm. sauna This invention relates to thermal cut-outs disclosed. The upper end of conductor 14 and is an improvement of the subject matter is bent as indicated at 20 to provide a s ring disclosed by me in my co-pendin applicacontact projecting into the socket7and ormtion, Serial Number 316,553, filed glovember ing' a part of the internal thread 21 of said 5 1, 1928. I h p socket, there being a suitable recess 22 pro- 50 i The purpose of the present invention is vided in the upper edge of the socket to perto provide an adapter throu h the medium of mit the spring contact 20 to be forced back in the'aforesaid when the fuse lug is inserted in the socket ap lication can be used with standard recepas h r in er escribcd.

l=tac es. The fuse lug shown in Figure is con- 55 Other purposes, advantages and characterstructed as isclosed inmg prior application istic features of the invention will be more previously referred toan consists of a body readily understood from the following deof insulating material having its upper portailcd dcsc'ri tion and accompanying drawtion surrounded'bi metallic threaded sleeve h 23 adapted to be t readed into the socket 7, w gure 1 isato plan view of the'adapter. the lower portion of the plug being in the Figure 2 is a-si e elevation. form of an extension 24 ada ted to be snu ly Figure 3 is avertical sectional view taken received in the recess 9 and aving a suita lealong the line 33 of Figure 1. contact tip 25 engageable with the contact Flguretisatransverse sectional view taken "head 10, said contact tip being connected along the line H of Figure 3. to the sleeve 23 by an interiorfuse wire not 7 Figure 5 is a side elevation of the fuse lug. shown. When the fuse plug 1s threaded-mto In the accompanying drawings, 5 esigthe socket 7 the sleeve 231s engaged by the nates a body of insulating material having its spring con'tact'20 to complete the circuit con- 5' lower end reducedandexternally threaded as nection betweenthe plug and the body 5. 7 indicated at 6. Formed in said body is .a The lower end of'the body 5, is adapted to be socket 7 having a bottom wall 8 in the center screwed into the socket of any standard reof which isa relatively deep recess 9. Rest ceptacle. Such receptacles are provided,

\ ing on the bottom wall of said recess is-a con- (as is well known). with a central contact a ing cutting edge 19 for a purpose to ductor 11 to a second contact head 12 engagtact 12 and with a circumferential sleeve or ing the lower end ofthe bodv5. The upper contact which will be engaged b the threadportion of said body is provided at one s de ed portion of the conductor 14 t us completof the socket 7'with a vertical passage 13 in ing the circuit connections between the plug 35 which is inserted a conductor 14 having its and receptacle. Once, the body 5 is screwed so lower end extending downwardly beyond into a suitable receptacle the removal of said said passage and offset inwardl as at 16 to body-is prevented y the biting engagement lie within a recess 17 provide therefor in obtaining'between the cutting ed cs 19 of the lower externally threaded portion of the the threads 18 and the cooperatmg t reads of bod 5. It will be noted that the outer edge the receptacle sleeve. Q6 of t e ofl'set portion 16 of said conductor is I Having thus fully described and what I threaded as at 18 to .form a continuation of now conceive to be the preferred embodithe thread 6. As showntoadvantage in Figment of the invention it is understood the ure 4 the. thread 18 is formed with a pzof'ectvarious changes ma be-resorted to within the ter tact head 10 whichis connected by a.conwhich will be engaged by the aforesaid conscope and spirit 0 the appended claim'. 00

2 Lagoon What I claim is:

A device of the character described com rising a bod of insulating material, the ower end of said body bein reduced and externally threaded, a socket ormed in the' upper portion" of the body and internally threaded, said body having a vertically extending groove, t e upper end of said conductor bemg bent to form a spring contact pro'ecting into said socket and the lower end of t e conductor be bent to conform to the externally th ed portion, and a cutting edge formed on the exposed lower portion of e conductor for a purpose specified.

In testimony whereof I hereunto afix my signature.

JACOB M. FRIED.

oove, a conductor mounted in said 

